Tyler
48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
"""Rotating log file setup for MailRelay."""
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import logging
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from logging.handlers import RotatingFileHandler
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from pathlib import Path
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LOG_PATH = Path(__file__).parent.parent / "data" / "mailrelay.log"
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LOG_FORMAT = "%(asctime)s [%(levelname)s] %(name)s: %(message)s"
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MAX_BYTES = 5 * 1024 * 1024 # 5 MB
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BACKUP_COUNT = 3
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def get_logger(name: str) -> logging.Logger:
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"""Return a named logger wired to the shared rotating file + stderr."""
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logger = logging.getLogger(name)
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if logger.handlers:
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return logger # already configured
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logger.setLevel(logging.DEBUG)
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# Rotating file handler
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LOG_PATH.parent.mkdir(parents=True, exist_ok=True)
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file_handler = RotatingFileHandler(
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LOG_PATH, maxBytes=MAX_BYTES, backupCount=BACKUP_COUNT, encoding="utf-8"
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)
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file_handler.setLevel(logging.DEBUG)
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file_handler.setFormatter(logging.Formatter(LOG_FORMAT))
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# Console handler (INFO and above)
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console_handler = logging.StreamHandler()
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console_handler.setLevel(logging.INFO)
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console_handler.setFormatter(logging.Formatter(LOG_FORMAT))
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logger.addHandler(file_handler)
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logger.addHandler(console_handler)
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return logger
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def tail_log(lines: int = 50) -> str:
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"""Return the last N lines of the log file as a string."""
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if not LOG_PATH.exists():
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return "(no log file yet)"
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text = LOG_PATH.read_text(encoding="utf-8")
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all_lines = text.splitlines()
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return "\n".join(all_lines[-lines:])
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